IFRD1 (interferon related developmental regulator 1) functions as a transcriptional regulator controlling cellular differentiation, proliferation, and tissue homeostasis across multiple organ systems. The protein acts as a critical mediator in paligenosis, a conserved cellular reprogramming process where differentiated cells return to progenitor states for tissue repair 1. IFRD1 suppresses TRP53 to license cell cycle reentry during the final stage of paligenosis, ensuring only healthy cells proliferate 1. In liver regeneration, IFRD1 orchestrates metabolic-immune crosstalk by stabilizing SLC25A5 to maintain hepatocyte β-oxidation and ATP production, which enables chr7 remodeling and chemokine expression to recruit regenerative macrophages 2. The protein is essential for urothelial homeostasis, where its loss leads to disrupted proteostasis, ER stress, and increased cell apoptosis 3. IFRD1 also regulates bone metabolism by controlling both osteoblast differentiation and osteoclast support 4. In cancer contexts, IFRD1 expression is associated with improved patient survival in gastric cancer 5 and is regulated through m6A methylation in breast cancer, affecting the HDAC3/p53/mTOR pathway 6. The gene shows developmentally regulated expression patterns and represents a potential therapeutic target for enhancing tissue regeneration 7.